diff mbox series

[net-next,2/2] net/smc: support ipv4 mapped ipv6 addr client for smc-r v2

Message ID 20241127094533.18459-3-guangguan.wang@linux.alibaba.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series net/smc: Two features for smc-r | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 3 this patch: 3
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 12 of 12 maintainers
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 4 this patch: 4
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 9 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest pending net-next-2024-11-27--12-00 (tests: 0)

Commit Message

Guangguan Wang Nov. 27, 2024, 9:45 a.m. UTC 
AF_INET6 is not supported for smc-r v2 client before, event if the
ipv6 addr is ipv4 mapped. Thus, when using AF_INET6, smc-r connection
will fallback to tcp, especially for java applications running smc-r.
This patch support ipv4 mapped ipv6 addr client for smc-r v2. Clients
using real global ipv6 addr is still not supported yet.

Signed-off-by: Guangguan Wang <guangguan.wang@linux.alibaba.com>
Reviewed-by: Wen Gu <guwen@linux.alibaba.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Reviewed-by: D. Wythe <alibuda@linux.alibaba.com>
---
 net/smc/af_smc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 9d76e902fd77..41923e0a6e33 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1116,7 +1116,8 @@  static int smc_find_proposal_devices(struct smc_sock *smc,
 	ini->check_smcrv2 = true;
 	ini->smcrv2.saddr = smc->clcsock->sk->sk_rcv_saddr;
 	if (!(ini->smcr_version & SMC_V2) ||
-	    smc->clcsock->sk->sk_family != AF_INET ||
+	    (smc->clcsock->sk->sk_family != AF_INET &&
+	     !ipv6_addr_v4mapped(&smc->clcsock->sk->sk_v6_rcv_saddr)) ||
 	    !smc_clc_ueid_count() ||
 	    smc_find_rdma_device(smc, ini))
 		ini->smcr_version &= ~SMC_V2;